SOLVED: To simulate the pH of blood, which is 7.4, an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogen phosphate (Ka = 6.2 x 10^-8) and sodium hydrogen phosphate (Ka = 3.6 x 10^-13) together in an aqueous solution. What mole ratio of Na2HPO4/NaH2PO4 did she need to use?

to simulate the ph of blood which is 74 an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogen phosphate nah2po4 ka 62 108 and sodium hydroge 92892

a which of the two of the following compounds would you mix to make a buffer of ph 745 phosphoric acid fm 9800 sodium dihydrogen phosphate fm 11998 disodium hydrogen phosphate fm 14196 or so 53168